An excellent presentation.
There was just one key feature in the Bridge-ACR-Photoshop workflow which you didn't mention and that is the ability to open an image in Photoshop directly from ACR as a Smart Object.
This feature alone provides sufficient reason for me to use the Bridge/ACR workflow.
The ability to set Output RGB space (and therefore see accurate Histograms in ACR) is another major advantage in the Bridge workflow.
Lightroom 4 supports Soft Proof capability that also lets you see an accurate histogram for different output RGB spaces. Lightroom 5 now also supports under 'Edit In' > 'Open As Smart Object in Photoshop.'
I agree the tutorial was excellent, thank you very much. I would just like to add that there is no reason why you can't use both Lightroom and Adobe Bridge for"digtal asset management." Keyword metadata added in LR can be written to the file or XMP sidecar using CTRL+S keys that will appear in Adobe Bridge and vice-versa. I do most of my InDesign layout image processing using LR, but keep track of ALL my project assests using Bridge. Keywords are added using BOTH applications with no issues to date.